<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <script src="../vue.js"></script>
</head>

<body>
  <div id="app">
    <form action="###">
      <!-- 下拉列表单选时,data中也是使用字符串保存 -->
      请选择你喜欢的城市
      <select name="city" v-model="city">
        <option value="北京">北京</option>
        <option value="上海">上海</option>
        <option value="广州">广州</option>
        <option value="深圳">深圳</option>
        <option value="曹县">曹县</option>
      </select>


      <select name="food" multiple v-model="food">
        <option value="螺蛳粉">螺蛳粉</option>
        <option value="臭豆腐">臭豆腐</option>
        <option value="热干面">热干面</option>
        <option value="胡辣汤">胡辣汤</option>
      </select>
    </form>
  </div>
  <script>
    Vue.config.productionTip = false;

    const vm = new Vue({
      el: "#app",
      data() {
        return {
          city: "深圳",
          food: []
        }
      }
    })
  </script>
</body>

</html>